Re: sql_text during parsing

Nenad

In a case similar to yours I was saved by to *dba_hist_sqltext* :-)

select sql_text from dba_hist_sqltext where sql_id = '6tcs65pchhp71';

https://hourim.wordpress.com/2018/03/17/library-cache-lock/

Best regards
Mohamed

Le lun. 12 juil. 2021 à 19:20, Noveljic Nenad <nenad.noveljic_at_vontobel.com> a écrit :

> This statement could be considered invalid because it failed parsing (due
> to memory allocation error).
>
>
>
> The same text (~ 20 characters long) was shown in v$sqlarea.text as well.
>
>
>
> Interestingly, oradebug current_sql shows a much longer text. It’s
> possible that this is the unparsed text – the Oracle dedicated server
> process has the full text all the time, but it’s just not externalized
> until the parsing is over. Unfortunately, this text is trimmed – maybe by
> the oradebug presentation layer code.
>
>
>
> Best regards,
>
>
>
> Nenad
>
>
>
> *From:* oracle-l-bounce_at_freelists.org <oracle-l-bounce_at_freelists.org> *On
> Behalf Of *Jonathan Lewis
> *Sent:* Montag, 12. Juli 2021 19:08
> *To:* ORACLE-L (oracle-l_at_freelists.org) <oracle-l_at_freelists.org>
> *Subject:* Re: sql_text during parsing
>
>
>
>
>
> I was just looking back at a note I wrote a few years ago (
> https://jonathanlewis.wordpress.com/2017/10/03/parsing ) about invalid
> SQL getting into the library cache (x$kglob) even though not being made
> visible through v$sql; and I've only just noticed that the content was
> trimmed to the first 20 charactes - which is the same as the fragment that
> you found with the query.I suggested. So now I'm wondering whether it's
> just a small chunk acting as a place-holder in the library cache, until the
> parse is complete - although this comment from Liron Amitzi on the blog
> note suggests it might be the whole thing:
> https://jonathanlewis.wordpress.com/2017/10/03/parsing/#comment-101173
>
>
>
>
>
> Regards
>
> Jonathan Lewis
>
>
>
>
>
> On Mon, 12 Jul 2021 at 17:52, Noveljic Nenad <nenad.noveljic_at_vontobel.com>
> wrote:
>
> A combination of Andy's and Jonathan's ideas to try tomorrow:
>
> set long 10000
> oradebug setospid ...
> oradebug current_sql
>
> Best regards,
>
> Nenad
>
> -----Original Message-----
> From: Noveljic Nenad
> Sent: Montag, 12. Juli 2021 18:35
> To: 'Stefan Koehler' <contact_at_soocs.de>; ORACLE-L (oracle-l_at_freelists.org)
> <oracle-l_at_freelists.org>
> Subject: RE: sql_text during parsing
>
> Hi Stefan,
>
> I suspended the process during parsing and got the process dump and error
> stack trace, but nothing.
>
> My guess is that the statement is properly registered in the memory (from
> the Oracle C code perspective) only after the parsing.
>
> Unless someone comes up with a better idea, I'll ask Tableau people
> tomorrow if they could trace generated SQLs on the client.
>
> Otherwise, I have to look for SQL text in the process private memory. In
> 12c, the second argument to the first qcplgte call (there are many
> recursive calls to this function) contained the pointer to a structure
> which contained the pointer to SQL text. I'll start from there.
>
> Best regards,
>
> Nenad
>
>
> -----Original Message-----
> From: Stefan Koehler <contact_at_soocs.de>
> Sent: Montag, 12. Juli 2021 17:28
> To: Noveljic Nenad <nenad.noveljic_at_vontobel.com>; ORACLE-L (
> oracle-l_at_freelists.org) <oracle-l_at_freelists.org>
> Subject: RE: sql_text during parsing
>
> Hello Nenad,
> any chance with a process state dump (or error stack trace)?
>
> Best Regards
> Stefan Koehler
>
> Independent Oracle performance consultant and researcher
> Website: http://www.soocs.de
> Twitter: _at_OracleSK<
>
> > Noveljic Nenad <nenad.noveljic_at_vontobel.com> hat am 12.07.2021 17:25
> geschrieben:
> >
> > Thanks!
> >
> > I got a part of SQL (it’s chopped)
> >
> > Any idea for getting the full text?
> >
> > SQL> oradebug setospid 17876
> > Oracle pid: 107, Unix process pid: 17876, image: oracle_at_svdbp02p
> > SQL> oradebug current_sql
> > SELECT (CASE WHEN ((CASE WHEN (CASE WHEN (CASE WHEN (CASE WHEN (CASE
> WHEN (CASE WHEN (CASE WHEN (CASE WHEN ((CASE WHEN ((CASE WHEN (((CASE WHEN …
> >
> > The problem might be with the parsing of a nested case.
> >
> > Have to get the full text to experiment.
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